Packing box

ABSTRACT

The invention relates to the trapezium packing box made of the cardboard, which comprises a rectangular upper board, a rectangular bottom board, two relative rectangular side boards and two relative trapezium side boards; said upper board, said bottom board and said four side boards are connected together by respective tongues and engaging grooves and enclose the chamber therein. The present invention improves the space using rate and fits for packing non-quadrate goods such as irons.

FIELD OF THE INVENTION

The invention relates to the packing box.

RELATED ART

Traditional packing box is quadrate form, but packed goods such as iron are not quadrate. When non-quadrate goods are packed into quadrate box, the quadrate box has an untapped space. That will reduce considerable goods quantity of incasement and increase transport costs.

SUMMARY OF THE INVENTION

The invention provides a trapezium packing box, which overcomes the disadvantages of lower space use ratio that non-quadrate goods are packed into quadrate box.

Such object of the present invention will become apparent in the ensuing description:

A packing box made of the cardboard, wherein said box is trapezium, which comprises a rectangular upper board, a rectangular bottom board, a first rectangular side board, a second rectangular side board, a first trapezium side board and a second trapezium side board; said upper board, said bottom board and said four side boards are connected together by respective tongues and engaging grooves and enclose chamber therein.

Said first and second trapezium side boards are the isosceles trapezoid or right-angle trapezoid.

Said upper board, said first rectangular side board, said bottom board and said second rectangular side board are connected with each other in turn by their creases; said first and second trapezium side board extend from the left and the right side of said first rectangular side board; said first trapezium side board and said second trapezium side board are connected to said first rectangular side board by their creases.

Said second rectangular side board comprises a left side board and a right side board extending from its left side and its right side; said left side board and said right side board are connected to said second rectangular side board by creases.

Said upper board comprises a first tongue and a first engaging groove; said second rectangular side board comprises a second tongue and a second engaging groove matched with the first tongue and the first engaging groove of said upper board; said first trapezium side board comprises a third tongue and a third engaging groove; the left side of said second rectangular side board comprises a fourth tongue and a fourth engaging groove matched with the third tongue and the third engaging groove of said first trapezium side board; said second trapezium side board comprises a fifth tongue and a fifth engaging groove; the right side of said second rectangular side board comprises a sixth tongue and a sixth engaging groove matched with the fifth tongue and the fifth engaging groove of said second trapezium side board.

Said left side board and said right side board have the same figures with said first trapezium side board and said second trapezium side board respectively.

Said first trapezium side board comprises a first shield board and said second trapezium side board comprises a second shield board; said first shield board is connected to said first trapezium side board by crease and said second shield board is connected to said second trapezium side board by crease.

Said bottom board comprises a left wing board and a right wing board extending from its left side and its right side; said left wing board and said right wing board are connected to said bottom board by creases.

The length of the upper side of said trapezium side boards is 60-120 mm, the length of the bottom side of said trapezium side boards is 130-180 mm and the distance between said upper side and said bottom side is 120-180 mm; the vertical distance between said two trapezium side boards is 200-400 mm.

The length ratio of said upper side to said bottom side is 19:30.

The included angle between the inclined side of said trapezium side board and said bottom side is 65°-74°.

The length of the upper side of said trapezium side boards is 200-300 mm, the length of the bottom side of said trapezium side boards is 250-350 mm and the distance between said upper side and said bottom side is 120-180 mm; the vertical distance between said two trapezium side boards is 100-160 mm.

As shown in above-mentioned descriptions compared with the existing technology, the invention has advantages as follows: The present invention improves the space using rate and fits for packing inclined goods such as irons

1. The present improves the space use ratio and fits for packing non-quadrate goods such as irons.

2. To compare with the quadrate box, the present invention has smaller spread area and lower cost.

3. The boards are connected together by respective tongues and engaging grooves without using glue. That can save costs and provide more environmental protection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a three-dimensional structure diagram of embodiment one of the invention.

FIG. 2 is a deployable structure diagram of embodiment one of the invention.

FIG. 3 is a structure diagram when the trapezium packing boxes of embodiment one of the invention are encased into outer box.

FIG. 4 is a structure diagram when the trapezium packing boxes of embodiment two of the invention are encased into outer box.

FIG. 5 is a structure diagram when the trapezium packing boxes of embodiment three of the invention are encased into outer box.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Taking an example of iron packing box, the invention will be further described.

Embodiment One

As shown in FIGS. 1 and 2, a packing box, which forms as trapezium and is made of a cardboard, comprising a rectangular upper board 11, a rectangular bottom board 12, a first rectangular side board 13, a second rectangular side board 14, a first trapezium side board 15 and a second trapezium side board 16; the rectangular upper board 11, the rectangular bottom board 12, the first rectangular side board 13, the second rectangular side board 14, the first trapezium side board 15 and the second trapezium side board 16 are connected together by respective tongues and engaging grooves. The first trapezium side board 15 and the second trapezium side board 16 are right-angle trapezoids.

The upper board 11, the first rectangular side board 13, the bottom board 12 and the second rectangular side board 14 are connected with each other in turn by their creases. The first rectangular side board 13 comprises a first trapezium side board 15 and a second trapezium side board 16 extending from its left side and its right side. The first trapezium side board 15 and the second trapezium side board 16 are connected to the first rectangular side board 13 by their creases.

The second rectangular side board 14 comprises a left side board 141 and a right side board 142 extending from its left side and its right side; the left side board 141 and the right side board 142 are connected to the second rectangular side board 14 by their creases.

The upper board 11 has a first tongue 111 and a first engaging groove 112; the second rectangular side board 14 has a second engaging groove 144 and a second tongue 143 matched with the first tongue 111 and first engaging groove 112 of the upper board 11; the first trapezium side board 15 has a third tongue 151 and a third engaging groove 152; the left side of the second rectangular side board 14 has a fourth engaging groove 146 and a fourth tongue 145 matched with the third tongue 151 and the third engaging groove 152 of the first trapezium side board 15; the second trapezium side board 16 has an fifth tongue 161 and a fifth engaging groove 162; the right side of the second rectangular side board 14 has an sixth tongue 147 and a sixth engaging groove 148 matched with the fifth engaging groove 162 and the fifth tongue 161 of the second trapezium side board 16.

The bottom board 12 comprises a left wing board 121 and a right wing board 122 extending from its left side and its right side; the left wing board 121 and the right wing board 122 are connected to the lower board 12 by creases.

The first trapezium side board 15 comprises a first shield board 153 and the second trapezium side board 16 comprises a second shield boards 163; the first shield boards 153 and the second shield board 163 are connected to the first trapezium side board 15 and the second trapezium side board 16 by creases.

As shown in FIGS. 3, 4 and 5, according to table one as bellow, it is obvious that the invention can increase considerable goods quantity of incasement.

TABLE ONE Goods quantity of incasement 40Hft/ 40 ft/ 20 ft/ Variety of Size of packing Size of outer container container container packing box box box (pcs) (pcs) (pcs) Quadrate L316 * W138 * H158 L326 * W290 * H334 7420 Added 6636 Added 3220 Added packing box (4 quadrate space space space packing boxes) use use use ratio ratio ratio Quadrate L316 * W138 * H158 L426 * W322 * H330 7770 4.72% 7170 8.05% 3402 5.65% packing box (6 quadrate packing boxes) Trapeziform L316 * W * H158 L326 * W248 * H330 9052 21.99% 8200 23.60% 3956 22.86% packing box (Wa = 95 Wb = 150) (4 trapezium of packing embodiment boxes) one L316 * W * H158 L492 * W248 * H330 9180 23.72% 8514 28.30% 4086 26.89% (Wa = 95 Wb = 150) (6 trapezium packing boxes) Trapeziform L316 * W * H158 L476 * W322 * H168 8680 16.98% 7868 18.60% 3836 19.13% packing box (Wa = 95 Wb = 150) (4 trapezium of packing embodiment boxes) two Trapeziform L * W138 * H158 L326 * W248 * H330 8340 12.39% 7512 13.20% 3672 14.03% packing box (4 trapezium of packing embodiment boxes) three

According to table two, it is obvious that the invention can minish materials of packing box and materials of outer box.

TABLE TWO Area Area of of Variety of Size of packing packing Size of outer outer packing box box box box box Quadrate L316 * W138 * 0.399 L326 * W290 * H334 0.787 packing box H158 (4 quadrate packing boxes) Trapeziform L316 * W * 0.388 L330 * W258 * H346 0.728 packing box H158 (4 trapeziform (Wa = 95 Wb = packing boxes) 150)

In tables one and two, the unit of L, W, H is mm, the unit of area is m².

The foregoing description of the exemplary embodiment of the invention has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Many modifications and variations are possible in light of the above teaching. All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope. 

1. A packing box made of the cardboard, wherein said box form is a trapezium, and comprises a rectangular upper board, a rectangular bottom board, a first rectangular sideboard, a second rectangular side boards, a first trapezium side board and a second trapezium side board; said upper board, said bottom board and said four side boards are connected together by respective tongues and engaging grooves and enclose chamber therein.
 2. The packing box according to claim 1, wherein said first and second trapezium side boards are the isosceles trapezoid or the right-angle trapezoid.
 3. The packing box according to claims 1, wherein said upper board, said first rectangular side board, said bottom board and said second rectangular side board are connected with each other in turn by their creases; said first and second trapezium side board extend from the left and the right side of said first rectangular side board; said first trapezium side board and said second trapezium side board are connected to said first rectangular side board by their creases.
 4. The packing box according to claim 1, wherein said second rectangular side board comprises a left side board and a right side board extending from its left and right side; said left side board and said right side board are connected to said second rectangular side board by creases.
 5. The packing box according to claim 1, wherein said upper board comprises a first tongue and a first engaging groove; said second rectangular side board comprises a second tongue and a second engaging groove matched with the first tongue and the first engaging groove of said upper board; said first trapezium side board comprises a third tongue and a third engaging groove; the left side of said second rectangular side board comprises a fourth tongue and a fourth engaging groove matched with the third tongue and the third engaging groove of said first trapezium side board; said second trapezium side board comprises a fifth tongue and a fifth engaging groove; the right side of said second rectangular side board comprises a sixth tongue and a sixth engaging groove matched with the fifth tongue and the fifth engaging groove of said second trapezium side board.
 6. The packing box according to claim 4, said left side board and said right side board have the same figures with said first trapezium side board and said second trapezium side board respectively.
 7. The packing box according to claims 1, wherein said first trapezium side board comprises a first shield board and said second trapezium side board comprises a second shield board; said first shield board is connected to said first trapezium side board by crease and said second shield board is connected to said second trapezium side board by creases.
 8. The packing box according to claims 1, wherein said bottom board comprises a left wing board and a right wing board extending from its left side and its right side, wherein said left wing board and said right wing board are connected to said bottom board by creases.
 9. The packing box according to claims 1, wherein the length of the upper side of said trapezium side boards is 60-120 mm, and the length of the bottom side of said trapezium side boards is 130-180 mm and the distance between said upper side and said bottom side is 120-180 mm; the vertical distance between said two trapezium side boards is 200-400 mm.
 10. The packing box according to claim 9, wherein the length ratio of said upper side to said bottom side is 19:30.
 11. The packing box according to claim 10, wherein the included angle between the inclined side of said trapezium side board and said bottom side is 65°-74°.
 12. The packing box according to claims 1, wherein the length of the upper side of said trapezium side boards is 200-300 mm, the length of the bottom side of said trapezium side boards is 250-350 mm and the distance between said upper side and said bottom side is 120-180 mm; the vertical distance between said two trapezium side boards is 100-160 mm. 